1)43x+72=502 2)67-21y=25 3)19y-200=47 4)83+29x=982

1)43x=502-7243x=430x=[latex] frac{430}{43} [/latex]x=103)19y=47+20019y=247y=[latex] frac{247}{19} [/latex]y=132)67-21y=2521y=67-2521y=42y=[latex] frac{42}{21} [/latex]4)83+29x=98229x=982-8329x=899x[latex] frac{899}{29} [/latex]x=31